Snowplow



F. J. ROTH sNow PLow Dec. 19, 1944.

5 sheets-sheet 1 Filed May 17, 1943 EN mm2 I nvenlor F. J. ROTH Dec. 19, 1944.

SNOW PLOW Fil'ed May 17, 1943 5 Sheets-Sheet 2 DBG 19, 1944 F. J. vRom y 2,365,597

SNOW PLOW Filed May 17, 1943 5 Sheets-Sheet 4 F. J. ROTH Dec. 19, 1944.

SNOW PLOW Filed May 17, 1945 5 Sheets-Sheet 5 Inventor E lliioth,

n Attorney Patentedr Dec. 19, 1944 UNITED STATES] PATENT OFFICE sNowrLo'w Frederick James Both, Hncknall, England Application May 17, 1943, Serial No. 487,361 In Great Britain April 9, 1942 1 claim. (ci. 37-42) The invention is concerned with a snowplow, and its principal object is the provision of a snowplow capable of a double function, viz., the removal of deep snow and the subsequent removal of compacted snow and ice by means of a planing action. For this purpose a snowplow' according to this invention is provided with skids for the support of the mould board or blade, and with adjustment means for e'ecting a, relative height adjustment as between the lower edge of the blade land the skids, whereby the relation between said lower edge and the ground surface may be varied. Thus with the lower edge of the blade raised just above the ground surface or road surface, deep snow may be plowed away. Alternatively, by making the appropriate adjustment the front edge of the blade may be lowered on to the road surface so that compacted snow and ice may be planed away. The adjustment is preferably a spring adjustment and to.this end may include compression springs so disposed that adjustment tending to lower the said edge is eected against the spring action.

The foregoing and other features of the invention set out in the appended claim is incorporated in the construction now to be described, as a preferred example of the invention, with reference to the accompanying drawings, in which Figure l is a plan view of the plow;

Figure 2 is a section on the line l2--2 of Fig. 1

and illustrates the attachment of the plow to a propelling motor vehicle; and

Figure 3 is a sectional elevation, on a larger scale, taken on the line 3-3 in Fig. l.

Figure 4 is a plan view of a modified construction of plow;

Figure 5 is a side elevation thereof;

Figure 6 is a. longitudinal section, on a large scale, showing a detail thereof; while Figure 7 is a further longitudinal section showing one of the skids.

In the illustrated construction according to this invention, Figs. 1-3, the plow is designed t'o be propelled by a motor vehicle I0 and consists of a framework I I pivotally attached at its rear end, at I2, to the chassis of the vehicle and having a blade I3 wider than the frame, obliquely disposed to the length of the vehicle at its front end, the said blade I3 normally occupying a vertical plane and having its upper edge I 3' curved forward.

tend upwards through suitable holes in the plow frame and at their top ends, above the frame, are

provided with nuts I6 from which radiating arms extend so that they may readily be turned by hand. Additionally a strong compression spring I1 encircles each bolt between the skid I4 and the underside of the frame II. Therefore, by screwing the nuts It down the bolts I5 the springs I1 are compressed and the skids. I I are drawn closer to the frame II sothat the blade I3 is lowered. Alternatively, if the nuts I6 are slacked off the springs' Il expand and the blade I3 is raised. In order to relieve the bolts I5 ofthe rearward thrust necessarily imparted to the skids Il as they run on the surface of the ground or snowa thrust plate I8 is provided at each side of the plow frame against which plate I8 an upturned portion Il of the rear end of the adjacent skid Ill bears.

The frame," consists of two longitudinal mem- -bers Ha connected by transverse members IIb at least at the front and at the rear and preferably also at an intermediate location a short distance from the front end, the said longitudinal members lla, being braced together by diagonal members Ilc. At the rear each frame member IIa is provided with an upstanding plate or bracket I9 pierced with a hole through which, and through a similar hole in a plate 20 attached to the adjacent chassis member 2| of the vehicle I0, a pivot bolt or pin I2 1 may be inserted. The frame II is therefore piv- 'I'he frame Il is provided at each side and at the immediate rear of the blade I3 with a skid I4. Each skid consists of a metal plate bent to curve downwards between its front and rear ends.

otally suspended at its rear end and at its front end the weight is carried by the skids it or by the lower edge of the blade I3. Towards the front, and preferably adjacent to the intermediate transverse member IIb, two angle iron (or channel) uprights 22 are provided. These engage between two forwardly projecting brackets 23 which are secured to the front end of the longitudinal chassis members 2l of the vehicle and prevent lateral play of the frame Il. The uprights 22 are pierced at suitable locations in their height with holes 2l through which, and through holes in the aforesaid side brackets 23, pins may be inserted so that the frame may be secured in any one of several raised positions, as for example in a raised inoperative position when the plow is being moved from one location to another. The side members 23 may be connected by a cross member 25.

The plow blade I3 is pivoted to the frontend of the frame II about an axis 28 (which is oblique to the direction of travel but extends These ends are transflxed by bolts I5 which ex- 5l longitudinallyl of the blade) so that should its lower edge meet an obstruction (e. 8. a manhole cover) the said lower edge may yield backwardly and the top edge may swing forward. 'I'his yielding movement is opposed by tension springs 21 extending between the plow blade near the upper edge thereof and the frame. In its nor mal operative attitude the plow blade is drawn by said springs 21 backwards against two or more stops 23 which are conveniently formed by vright-angled brackets fixed vertically at the front ends of the frame members Ila.

It is also preferable to provide means for adjusting the initial height of the blade I3 on the frame I I. For this purpose, at the rear face of the blade there is a plurality of uprights 30 each conveniently consisting of a length of angle iron pierced with holes 3| at a plurality of locations one above the other, through any of which holes 3| and through holes in suitable members 32 at the front end of the frame, horizontal pivot bolts or pins 29 may be inserted. Conveniently the blade is pivoted lat three locations in its width, that is to say at the front end of each longitudinal member ||a of the frame and at a .location which is spaced laterally from the frame at the rearward end of the oblique blade. The pivot at this last mentioned location may be carried by a member Ild extending diagonally forward from the adjacent side member of the frame.

The lower edge of the blade I3 may be provided with a renewable metal strip |3a.

In the modified construction shown in Figs. 4-7, the skids I|4 are located within the width of the frame members I Ia and are preferably shod with renewable wearing shoes or wearing plates ||4b of hard-wearing metal. They are guided at their front and rear ends in ch-annel-like guide members IIB. The plow is pivotally suspended at its rear end by means of upstanding brackets I I9 riveted or bolted to each frame member Ia. A plate |33 bolted to each adjacent chassis member |2| depends downwardly and each associated bracket |I9 and plate |33 istransilxed by a bolt or pivot pin II 2 about which the plow ascissa? pivots. A series of holes |34 in the plates |33 allow of vertical adjustment, and a series of holes |33 on the frame member |||a permits of horizontal adjustment. Lateral movement is prevented by the means more particularly illus- Atrated in Figs. 4'6. O'n the front axle |33 of the vehicle there is a forward projection |31 formed by parallel vertical angle irons stii'lened by webs |31', which projection engages between members |39 projecting rearwardly from a cross member |||b of the plow frame and forming a guide. Means for carrying the plow in a raised inoperative position is provided by bars |39, slidable through guides |40, the rear ends of which bars |39 rest on a part of the vehicle, preferably the front axle |39, and are chamfered as shown at |29' in Fig. 6 to provide a ramp or incline engaging said part or axle. Handles |4| are provided forl moving said adjustment bars |39, and they are locked in the adjusted position by dowel pins |42 inserted through selected holes |43 in the bars |39 and registering holes in members |44 on the plow frame. The bars |39 may be adjusted sideways by means of a plurality of bolt holes |45 in the plow frame cross members IIIb. The tension springs |21 may be adjusted by turn-buckles |48.

` Any or all of these features described with reference to Figs. 4-7 may be incorporated in the plow shown in Figs. 1-3 and vice-versa.

I claim:

A snowplow having a frame provided with skids for the support of the mould blade, bolts extending upwards from the skids through parts on the frame, nuts on said bolts above said parts,

and compression springs encircling the bolts be-v tween said parts and skids whereby adjustment tending to lower the edge of the blade relative to the skids is eected against the compression of said springs; and thrust plates carried by the frame engageable by the ends of the"4 skids to relieve the strain on said bolts.

FREbERJcK JAMES ROTH. 

